Alarm indication system of aircraft cockpit control panel

Abstract

The invention discloses an aircraft cockpit control panel alarm indication system. The aircraft cockpit control panel alarm indication system comprises an interface protection circuit, a logic circuit, an alarm suppression switch, an indication lamp driving circuit, an indication lamp, a buzzer driving circuit and a buzzer. The beneficial effects of the invention are that the system has the functions of fault indication light alarm, buzzer sound alarm, alarm cancellation and the like; and moreover, the structure is simpler.

Description

Technical Field

[0001] This invention relates to an aircraft cockpit control panel alarm indication system, and more particularly, to an aircraft cockpit control panel alarm indication system. Background Technology

[0002] Aircraft cockpit control panels with alarm indications need to have functions such as light alarms, buzzer audible alarms, and alarm cancellation. Current designs for aircraft cockpit control panels involve each fault indication signal having its own fault indicator light, buzzer, and switch. This independent circuit design is very disadvantageous in terms of weight, reliability, cost, and electromagnetic compatibility, and also increases the complexity of the system. Summary of the Invention

[0003] The purpose of this invention is to solve the problem of complexity in existing aircraft cockpit control panel alarm indication systems, and to provide an aircraft cockpit control panel alarm indication system with a simpler structure.

[0004] To achieve the above objectives, the present invention provides a technical solution: an alarm indication system for an aircraft cockpit control panel, comprising: an interface protection circuit, a logic circuit, an alarm suppression switch, an indicator light driving circuit, an indicator light, a buzzer driving circuit, and a buzzer. The alarm signal input terminal of the interface protection circuit is used to receive externally provided alarm signals; the alarm signal output terminal of the interface protection circuit is connected to the alarm signal input terminal of the logic circuit; the suppression signal output terminal of the alarm suppression switch is connected to the suppression signal input terminal of the logic circuit; the indicator light driving signal output terminal of the logic circuit is connected to the indicator light driving signal input terminal of the indicator light driving circuit; the indicator light driving signal output terminal of the indicator light driving circuit is connected to the indicator light; the buzzer driving signal output terminal of the logic circuit is connected to the buzzer driving signal input terminal of the buzzer driving circuit; and the buzzer driving signal output terminal of the buzzer driving circuit is connected to the buzzer.

[0005] As a preferred embodiment of the aircraft cockpit control panel alarm indication system, the control logic of the logic circuit is configured as follows: when the input is an alarm signal, an indicator light on signal and a buzzer on signal are output to the indicator light driver circuit and the buzzer driver circuit respectively, causing the indicator light and the buzzer to work; when the input is a suppression signal, an indicator light off signal and a buzzer off signal are output to the indicator light driver circuit and the buzzer driver circuit respectively, causing the indicator light and the buzzer to stop working.

[0006] As a preferred solution for an aircraft cockpit control panel alarm indication system, when there are multiple input alarm signals, the alarm signals are processed according to their priority. If the priorities are the same, they are processed simultaneously.

[0007] As a preferred solution for the alarm indication system of the aircraft cockpit control panel, the logic circuit is based on a D flip-flop with reset, rising edge triggering and latching functions. The suppression signal provides the rising edge triggering, and the alarm signal provides the input signal and reset signal. When an alarm signal is input, the output indicator light turns on and the buzzer turns on. When a suppression signal is input, the output indicator light turns off and the buzzer turns off, and the D flip-flop latches the signal. When the alarm ends, the reset signal is grounded and the D flip-flop clears the latch.

[0008] Compared with the prior art, the beneficial effects of the present invention are at least as follows: it has functions such as light alarm for fault indication, sound alarm for buzzer, and alarm cancellation; and the structure is simpler. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0010] Figure 2 This is a schematic diagram of the specific circuit structure of an embodiment of the present invention.

[0011] The numbers in the diagram are: 1. Interface protection circuit; 2. Logic circuit; 3. Alarm suppression switch; 4. Indicator light driver circuit; 5. Indicator light; 6. Buzzer driver circuit; 7. Buzzer. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. It should be noted that these descriptions of embodiments are intended to aid in understanding the invention and do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0013] See Figure 1 The figure shows an aircraft cockpit control panel alarm indication system. The system includes: interface protection circuitry, logic circuitry, alarm suppression switch, indicator light drive circuitry, indicator lights, buzzer drive circuitry, and a buzzer.

[0014] The alarm signal input terminal of the interface protection circuit is used to receive alarm signals provided externally. The alarm signal output terminal of the interface protection circuit is connected to the alarm signal input terminal of the logic circuit.

[0015] The suppression signal output terminal of the alarm suppression switch is connected to the suppression signal input terminal of the logic circuit.

[0016] The indicator light drive signal output terminal of the logic circuit is connected to the indicator light drive signal input terminal of the indicator light drive circuit. The indicator light drive signal output terminal of the indicator light drive circuit is connected to the indicator light.

[0017] The buzzer drive signal output terminal of the logic circuit is connected to the buzzer drive signal input terminal of the buzzer drive circuit. The buzzer drive signal output terminal of the buzzer drive circuit is connected to the buzzer.

[0018] The control logic of the logic circuit is configured as follows:

[0019] 1. When an alarm signal is input, an indicator light on signal and a buzzer on signal are output to the indicator light driver circuit and the buzzer driver circuit, respectively, causing the indicator light and the buzzer to operate. When a suppression signal is input, an indicator light off signal and a buzzer off signal are output to the indicator light driver circuit and the buzzer driver circuit, respectively, causing the indicator light and the buzzer to stop operating.

[0020] 2. When there are multiple input alarm signals, they are processed according to priority. Alarm signals with higher priority are processed before those with lower priority. If the priorities are the same, they can be processed simultaneously.

[0021] The logic circuit is based on a D flip-flop with reset, rising edge triggering, and latching functions. A suppressor signal provides the rising edge trigger, and an alarm signal provides both the input and reset signals. When an alarm signal is input, the output indicator light and buzzer are turned on. When a suppressor signal is input, the output indicator light and buzzer are turned off, and the D flip-flop latches the signal. When the alarm ends, the reset signal is grounded, and the D flip-flop clears the latch.

[0022] For specific implementation, please refer to Figure 2 The indicator signals A and B are multiplexed by LED D1 to illuminate and indicate the indicator signals.

[0023] When switch A is pressed, Q5 conducts, and the power supply Vcc flows through Q5, causing Q3 to conduct, and LED D1's negative terminal to ground, thus illuminating. If switch A is released and switch B is pressed, Q6 conducts, and the power supply Vcc flows through Q6, causing Q4 to conduct, and LED D1's negative terminal to ground, thus illuminating. If switch A remains pressed, LED D1's negative terminal is grounded and it illuminates; however, if switch B is pressed at this time, the information indicated by signal B will not be displayed.

[0024] Therefore, the alarm suppression switch and corresponding multiplexing circuit are introduced. When the alarm suppression switch is pressed, optocoupler U2 is turned on, and the output suppression signal is sent to latch U1 as the rising edge signal of CLK. Latch U1 receives the rising edge signal, where the preset value PRE is high (H). CLR and D follow the signal switch: when the signal switch is pressed, CLR and D are high (H); when the signal switch is released, CLR and D are ground (L). The truth table of the entire multiplexing function can be obtained as follows:

[0025]

[0026] That is, when signal switch A is pressed, LED D1 lights up; when the alarm suppression switch is pressed, LED D1 turns off; at this time, when signal switch B is pressed, LED D1 lights up.

[0027] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An aircraft cockpit control panel alarm indication system, characterized in that, include: Interface protection circuit, logic circuit, alarm suppression switch, indicator light driver circuit, indicator light, buzzer driver circuit, buzzer; The alarm signal input terminal of the interface protection circuit is used to receive alarm signals provided externally. The alarm signal output terminal of the interface protection circuit is connected to the alarm signal input terminal of the logic circuit. The suppression signal output terminal of the alarm suppression switch is connected to the suppression signal input terminal of the logic circuit. The indicator light drive signal output terminal of the logic circuit is connected to the indicator light drive signal input terminal of the indicator light drive circuit. The indicator light drive signal output terminal of the indicator light drive circuit is connected to the indicator light. The buzzer drive signal output terminal of the logic circuit is connected to the buzzer drive signal input terminal of the buzzer drive circuit. The buzzer drive signal output terminal of the buzzer drive circuit is connected to the buzzer.

2. The aircraft cockpit control panel alarm indication system according to claim 1, characterized in that, The control logic of the logic circuit is configured such that: when the input is an alarm signal, an indicator light turn-on signal and a buzzer turn-on signal are output to the indicator light driver circuit and the buzzer driver circuit respectively, so that the indicator light and the buzzer can work; when the input is a suppression signal, an indicator light turn-off signal and a buzzer turn-off signal are output to the indicator light driver circuit and the buzzer driver circuit respectively, so that the indicator light and the buzzer can stop working.

3. The aircraft cockpit control panel alarm indication system according to claim 2, characterized in that, When there are multiple input alarm signals, the alarm signals are processed according to their priority.

4. The aircraft cockpit control panel alarm indication system according to claim 3, characterized in that, If they have the same priority, process them simultaneously.

5. The aircraft cockpit control panel alarm indication system according to claim 2, characterized in that, The logic circuit is based on a D flip-flop with reset, rising edge trigger, and latch functions. The suppression signal provides the rising edge trigger, and the alarm signal provides the input and reset signals. When an alarm signal is input, the output indicator light and buzzer are turned on. When a suppression signal is input, the output indicator light and buzzer are turned off, and the D flip-flop latches the signal. When the alarm ends, the reset signal is grounded, and the D flip-flop clears the latch.

Images